Disabling Laptop Screen with Ubuntu Server

As a part of my home network setup, I use an old Dell Studio XPS 15″ laptop as my “server.” It’s currently running Ubuntu 19.10. One issue I had during the last update was that whatever I set up a long time ago to manage the lid switch policy was lost, so I had to re-google it and re-do it, because I don’t want the screen to be on 24/7.